Examples with VariableDeclarationStatement com.google.devtools.j2objc.ast.VariableDeclarationStatement used on opensource projects

Example 1 with VariableDeclarationStatement

use of com.google.devtools.j2objc.ast.VariableDeclarationStatement in project j2objc by google.

the class TreeConverter method convertVariableDeclaration.

private TreeNode convertVariableDeclaration(JCTree.JCVariableDecl node) {
    VarSymbol var = node.sym;
    if (var.getKind() == ElementKind.FIELD) {
        FieldDeclaration newNode = new FieldDeclaration(var, (Expression) convert(node.getInitializer()));
        convertBodyDeclaration(node, node.getModifiers(), newNode, var);
        return newNode;
    }
    if (var.getKind() == ElementKind.LOCAL_VARIABLE) {
        return new VariableDeclarationStatement(var, (Expression) convert(node.getInitializer()));
    }
    if (var.getKind() == ElementKind.ENUM_CONSTANT) {
        EnumConstantDeclaration newNode = new EnumConstantDeclaration().setVariableElement(var);
        convertBodyDeclaration(node, node.getModifiers(), newNode, var);
        ClassInstanceCreation init = (ClassInstanceCreation) convert(node.getInitializer());
        TreeUtil.moveList(init.getArguments(), newNode.getArguments());
        if (init.getAnonymousClassDeclaration() != null) {
            newNode.setAnonymousClassDeclaration(TreeUtil.remove(init.getAnonymousClassDeclaration()));
        }
        return newNode.setExecutablePair(init.getExecutablePair()).setVarargsType(init.getVarargsType());
    }
    return convertSingleVariable(node);
}

Example 2 with VariableDeclarationStatement

use of com.google.devtools.j2objc.ast.VariableDeclarationStatement in project j2objc by google.

the class OperatorRewriter method getRetainedWithTarget.

// Gets the target object for a call to the RetainedWith wrapper.
private Expression getRetainedWithTarget(Assignment node, VariableElement var) {
    Expression lhs = node.getLeftHandSide();
    if (!(lhs instanceof FieldAccess)) {
        return new ThisExpression(ElementUtil.getDeclaringClass(var).asType());
    }
    // To avoid duplicating the target expression we must save the result to a local variable.
    FieldAccess fieldAccess = (FieldAccess) lhs;
    Expression target = fieldAccess.getExpression();
    VariableElement targetVar = GeneratedVariableElement.newLocalVar("__rw$" + rwCount++, target.getTypeMirror(), null);
    TreeUtil.asStatementList(TreeUtil.getOwningStatement(lhs)).add(0, new VariableDeclarationStatement(targetVar, null));
    fieldAccess.setExpression(new SimpleName(targetVar));
    CommaExpression commaExpr = new CommaExpression(new CastExpression(typeUtil.getVoid(), new ParenthesizedExpression(new Assignment(new SimpleName(targetVar), target))));
    node.replaceWith(commaExpr);
    commaExpr.addExpression(node);
    return new SimpleName(targetVar);
}

Example 3 with VariableDeclarationStatement

use of com.google.devtools.j2objc.ast.VariableDeclarationStatement in project j2objc by google.

the class UnsequencedExpressionRewriter method extractInfixConditional.

private void extractInfixConditional(List<Statement> stmtList, InfixExpression conditional, List<VariableAccess> toExtract) {
    InfixExpression.Operator op = conditional.getOperator();
    List<Expression> branches = conditional.getOperands();
    int lastIfExtractIdx = 0;
    VariableElement conditionalVar = null;
    int lastExtracted = 0;
    Expression lastBranch = null;
    for (int i = 0; i < toExtract.size(); i++) {
        VariableAccess access = toExtract.get(i);
        TreeNode node = access.expression;
        while (node.getParent() != conditional) {
            node = node.getParent();
        }
        assert node instanceof Expression;
        Expression branch = (Expression) node;
        // Extract all accesses from the previous branch.
        if (lastBranch != null && branch != lastBranch) {
            extractOrderedAccesses(stmtList, lastBranch, toExtract.subList(lastExtracted, i));
            lastExtracted = i;
        }
        lastBranch = branch;
        // If there's a new access in a new branch, then we extract an if-statement.
        if (branch != branches.get(lastIfExtractIdx)) {
            TypeMirror boolType = typeUtil.getBoolean();
            if (conditionalVar == null) {
                conditionalVar = GeneratedVariableElement.newLocalVar("unseq$" + count++, boolType, currentMethod);
                conditional.replaceWith(new SimpleName(conditionalVar));
                stmtList.add(new VariableDeclarationStatement(conditionalVar, null));
            }
            List<Expression> subBranches = branches.subList(lastIfExtractIdx, branches.indexOf(branch));
            IfStatement newIf = new IfStatement();
            Expression ifExpr = new Assignment(new SimpleName(conditionalVar), conditionalFromSubBranches(subBranches, op));
            if (op == InfixExpression.Operator.CONDITIONAL_OR) {
                ifExpr = new PrefixExpression(boolType, PrefixExpression.Operator.NOT, ParenthesizedExpression.parenthesize(ifExpr));
            }
            newIf.setExpression(ifExpr);
            stmtList.add(newIf);
            Block thenBlock = new Block();
            stmtList = thenBlock.getStatements();
            newIf.setThenStatement(thenBlock);
            lastIfExtractIdx = branches.indexOf(branch);
        }
    }
    extractOrderedAccesses(stmtList, lastBranch, toExtract.subList(lastExtracted, toExtract.size()));
    if (conditionalVar != null) {
        List<Expression> remainingBranches = Lists.newArrayList();
        remainingBranches.add(new SimpleName(conditionalVar));
        remainingBranches.addAll(branches.subList(lastIfExtractIdx, branches.size()));
        stmtList.add(new ExpressionStatement(new Assignment(new SimpleName(conditionalVar), conditionalFromSubBranches(remainingBranches, op))));
    }
}

Example 4 with VariableDeclarationStatement

use of com.google.devtools.j2objc.ast.VariableDeclarationStatement in project j2objc by google.

the class UnsequencedExpressionRewriter method extractOrderedAccesses.

private void extractOrderedAccesses(List<Statement> stmtList, TreeNode subExpr, List<VariableAccess> toExtract) {
    for (int i = 0; i < toExtract.size(); i++) {
        VariableAccess access = toExtract.get(i);
        TreeNode topConditional = getTopConditional(access.expression, subExpr);
        if (topConditional != null) {
            // Conditional expressions require special handling when extracting the
            // access because execution of the access may not be guaranteed.
            // Here we collect all accesses that are decendant of the conditional
            // expression and pass them to an appropriate extraction method.
            int j = i + 1;
            for (; j < toExtract.size(); j++) {
                if (getTopConditional(toExtract.get(j).expression, subExpr) != topConditional) {
                    break;
                }
            }
            if (topConditional instanceof InfixExpression) {
                extractInfixConditional(stmtList, (InfixExpression) topConditional, toExtract.subList(i, j));
            } else if (topConditional instanceof ConditionalExpression) {
                extractConditionalExpression(stmtList, (ConditionalExpression) topConditional, toExtract.subList(i, j));
            } else {
                throw new AssertionError("Unexpected conditional node type: " + topConditional.getClass().toString());
            }
            i = j - 1;
        } else {
            VariableElement newVar = GeneratedVariableElement.newLocalVar("unseq$" + count++, access.expression.getTypeMirror(), currentMethod);
            stmtList.add(new VariableDeclarationStatement(newVar, access.expression.copy()));
            access.expression.replaceWith(new SimpleName(newVar));
        }
    }
}

Example 5 with VariableDeclarationStatement

use of com.google.devtools.j2objc.ast.VariableDeclarationStatement in project j2objc by google.

the class SwitchRewriter method fixVariableDeclarations.

/**
 * Moves all variable declarations above the first case statement.
 */
private void fixVariableDeclarations(SwitchStatement node) {
    List<Statement> statements = node.getStatements();
    Block block = new Block();
    List<Statement> blockStmts = block.getStatements();
    for (int i = 0; i < statements.size(); i++) {
        Statement stmt = statements.get(i);
        if (stmt instanceof VariableDeclarationStatement) {
            VariableDeclarationStatement declStmt = (VariableDeclarationStatement) stmt;
            statements.remove(i--);
            List<VariableDeclarationFragment> fragments = declStmt.getFragments();
            for (VariableDeclarationFragment decl : fragments) {
                Expression initializer = decl.getInitializer();
                if (initializer != null) {
                    Assignment assignment = new Assignment(new SimpleName(decl.getVariableElement()), TreeUtil.remove(initializer));
                    statements.add(++i, new ExpressionStatement(assignment));
                }
            }
            blockStmts.add(declStmt);
        }
    }
    if (blockStmts.size() > 0) {
        // There is at least one variable declaration, so copy this switch
        // statement into the new block and replace it in the parent list.
        node.replaceWith(block);
        blockStmts.add(node);
    }
}